NameSeasonsWorld ChampionshipsMotoGP Wins500cc Wins350cc WinsMoto2 Wins250cc WinsMoto3 Wins125cc Wins80cc Wins50cc WinsMotoE Wins Massimiliano d'Agnano199500000000000 Chris D'Aluisio1990-199400000000000 Luis D'Antin1989, 1992-199800000000000 Jehan d'Orgeix199300000000000 Gerard Daalhuizen?00000000000 Julien Da Costa1999-200000000000000 Patrick Dadier?00000000000 Willy Dafflon?00000000000 Kasma Daniel2017, 2020, 2022-202300000000000 Harold Daniell1949-195000100000000 Hakim Danish2025-00000010000 Chaz Davies2002-2007, 202400000000000 Raffaele De Rosa2004-201100000000000 Alex Debón2004-201100000000000 Ernst Degner1957-1966150cc - 19620000008070 Noah Dettwiler2023-202500000000000 Fabio Di Giannantonio2015-02001020000 Barry Ditchburn1977, 197900000000000 Jake Dixon2017, 2019-202500007000000 Mick Doohan1989-19995500cc - 1994-199805400000000 Scott Doohan199400000000000 Cees Doorakkers1984-199500000000000 William Doran1949, 1951-1953, 199100000000000 Stefan Dörflinger1973-1990480cc - 1984-198550cc - 1982-19830000000990 Andrea Dovizioso2001-20221125cc - 200415000405000 János Drapál1969-1973, 1976-1977, 1980-198100030100000 Mike Duff1961-196700000201000 Geoff Duke1950-19596500cc - 1951, 1953-1955350cc - 1951-1952022110000000 Jason Dupasquier2020-202100000000000